package com.itheima02.day02test;

/**
 * @author 刘全
 * @date 2021/7/16
 */
public class ComputerTest {
    public static void main(String[] args) {
        Computer c = new Computer();
        c.powerOn();
        c.useUsb(new Mouse());
        c.useUsb(new KeyBoard());
        c.powerOff();
    }
}
